PERFLUOROELASTOMER SEALS Introducing ePFE® Pawling Engineered Products has developed a unique, elastomeric technology which combines the benefits of perfluoroelastomer (FFKM) with the dynamic properties of more traditional materials. Our custom manufactured seals consist of a chemical and temperature resistant FFKM contact surface co-molded with a more resilient layer made of silicone. O-rings along with other custom cross sections can be made using this technology - with larger profiles and/or diameters preferred. Why Use ePFE? • ePFE can be used in lieu of underperforming seals made of HNBR, fluorosilicone, or FKM thereby reducing costly maintenance shutdowns to replace defective seals. • ePFE may be considered in applications where use of fully molded perfluoroelastomer seals (an example being Kalrez® or Chemraz®) are cost prohibitive. Since the FFKM layer comprises a much smaller percentage of the overall seal, larger profiles and/or diameters now make economic sense. • Depending on the application, ePFE parts can be designed for partial encapsulation which focuses the use of perfluoroelastomer at the contact areas only. • Use of a more resilient inner core will allow ePFE seals to more softly compress which is very important on larger sizes. This is especially the case when compared to PTFE encapsulated O-rings. Typical Applications Semiconductor Processing Plasma Processing Chamber Lid Seals Door Seals Window Seals Gate Valve Seals Thermal Processing Plenum Seals Wet Processes Door Seals Chemical Containment Seals Filter Seals Chemical/Pharmaceutical Processing Coupling Seals Door Seals Flange Seals

ePFE Technical Data Materials Comparison Chart Material Hydrocarbons, Aromatic (e.g. Benzene) Acids, Organic (e.g. Acetic Acid) Acids, Inorganic (e.g. Sulfuric Acid) Alkalis, Dilute (e.g. Sodium Hydroxide) Common Examples ePFE Closeup ePFE Design Window E Recommended Design Window ePFE Part Diameter (in) [mm] All information supplied by or on behalf of Pawling Engineered Products, Inc. in relation to its products, whether in the nature of data, recommendations or otherwise, is believed reliable, but Pawling Engineered Products, Inc. assumes no liability whatsoever in respect of application, processing...